System and method for assessing dimensions and eccentricity of valve annulus for trans-catheter valve implantation
First Claim
1. A system for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the system comprising:
- a balloon extending in a longitudinal direction and having an interior surface;
a shaft extending in the longitudinal direction within the balloon;
a first pair of electrodes on the interior surface of the balloon and configured to produce a first electrical field based on a first predetermined current;
a second pair of electrodes on the interior surface of the balloon and configured to produce a second electrical field based on a second predetermined current;
a first sense electrode pair on the shaft and configured to detect the first and second electrical fields; and
a second sense electrode pair on the shaft and configured to detect the first and second electrical fields.
1 Assignment
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Accused Products
Abstract
A system for detecting the dimensions and geometry of a native valve annulus for trans-catheter valve implantation includes a compliant balloon and a shaft within the balloon. One or more drive electrodes may be affixed to a surface of the balloon, and one or more sense electrodes may be affixed to the shaft. After insertion of the balloon into the native valve annulus, the drive electrodes may be energized with a predetermined voltage. Using a trained statistical model and the voltages measured at the sense electrodes, initial estimates of the cross-section of the valve annulus may be obtained. The initial estimates may then be provided to an optimization model of the valve annulus to obtain a highly accurate prediction of the cross-section of the valve annulus.
149 Citations
20 Claims
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1. A system for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the system comprising:
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a balloon extending in a longitudinal direction and having an interior surface; a shaft extending in the longitudinal direction within the balloon; a first pair of electrodes on the interior surface of the balloon and configured to produce a first electrical field based on a first predetermined current; a second pair of electrodes on the interior surface of the balloon and configured to produce a second electrical field based on a second predetermined current; a first sense electrode pair on the shaft and configured to detect the first and second electrical fields; and a second sense electrode pair on the shaft and configured to detect the first and second electrical fields. - View Dependent Claims (2, 3, 4, 5)
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6. A method for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the method comprising:
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loading a balloon catheter in a delivery system, the balloon catheter comprising; a balloon extending in a longitudinal direction and having an interior surface; a shaft extending in the longitudinal direction within the balloon; a first pair of drive electrodes on the interior surface of the balloon; a second pair of drive electrodes on the interior surface of the balloon; a first sense electrode pair on the shaft; and a second sense electrode pair on the shaft; delivering the balloon catheter to the native valve annulus; deploying the balloon catheter within the native valve annulus so that the balloon conforms to a surface of the native valve annulus; applying a first current to the first pair of electrodes to produce a first electrical field; applying a second current to the second pair of electrodes to produce a second electrical field; detecting the first electrical field with the first and second sense electrode pair; detecting the second electrical field with the first and second sense electrode pair; and determining one or more dimensions of the native valve annulus based at least on the detected first electrical field and the detected second electrical field. - View Dependent Claims (7, 8, 9, 10)
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11. A method for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the method comprising:
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receiving, with one or more processors, first voltage values from a first sense electrode pair on a shaft of a balloon catheter, the first sense electrode pair being configured to detect a first electrical field produced by a first pair of drive electrodes and a second electrical field produced by a second pair of drive electrodes; receiving, with the one or more processors, second voltage values from a second sense electrode pair on the shaft of the balloon catheter, the second sense electrode pair being configured to detect the first electrical field and the second electrical field; determining, with the one or more processors, a major axis length of the native valve annulus based on the first and second voltage values; determining, with the one or more processors, a minor axis length of the native valve annulus based on the first and second voltage values; and determining, with the one or more processors, an eccentricity of the native valve annulus based on the determined major axis length and the determined minor axis length. - View Dependent Claims (12, 13)
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14. A method for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the method comprising:
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loading a balloon catheter in a delivery system, the balloon catheter comprising; a balloon extending in a longitudinal direction; a shaft extending in the longitudinal direction within the balloon; a plurality of splines connected to the shaft; a first pair of electrodes on a first pair of the splines; and a second pair of electrodes on a second pair of the splines; delivering the balloon catheter to the native valve annulus; deploying the balloon catheter at a first longitudinal position within the native valve annulus so that the balloon conforms to a surface of the native valve annulus at the first longitudinal position; deploying the plurality of splines so that the splines move radially outward from the shaft; applying a first current to the first pair of electrodes to produce a first electrical field; measuring, using the second pair of electrodes, values associated with the first electrical field; applying a second current to the second pair of electrodes to produce a second electrical field; measuring, using the first pair of electrodes, values associated with the second electrical field; and determining one or more dimensions of the native valve annulus based at least on the values associated with the first electrical field and the second electrical field. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification